contrib/bind9/bin/named/main.c

   1 /*
   2  * Copyright (C) 2004-2013  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 1999-2003  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: main.c,v 1.180.14.4 2011/11/05 00:45:52 each Exp $ */
  19
  20 /*! \file */
  21
  22 #include <config.h>
  23
  24 #include <ctype.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include <isc/app.h>
  29 #include <isc/backtrace.h>
  30 #include <isc/commandline.h>
  31 #include <isc/dir.h>
  32 #include <isc/entropy.h>
  33 #include <isc/file.h>
  34 #include <isc/hash.h>
  35 #include <isc/os.h>
  36 #include <isc/platform.h>
  37 #include <isc/print.h>
  38 #include <isc/resource.h>
  39 #include <isc/stdio.h>
  40 #include <isc/string.h>
  41 #include <isc/task.h>
  42 #include <isc/timer.h>
  43 #include <isc/util.h>
  44
  45 #include <isccc/result.h>
  46
  47 #include <dns/dispatch.h>
  48 #include <dns/name.h>
  49 #include <dns/result.h>
  50 #include <dns/view.h>
  51
  52 #include <dst/result.h>
  53
  54 #include <dlz/dlz_dlopen_driver.h>
  55
  56 /*
  57  * Defining NS_MAIN provides storage declarations (rather than extern)
  58  * for variables in named/globals.h.
  59  */
  60 #define NS_MAIN 1
  61
  62 #include <named/builtin.h>
  63 #include <named/control.h>
  64 #include <named/globals.h>      /* Explicit, though named/log.h includes it. */
  65 #include <named/interfacemgr.h>
  66 #include <named/log.h>
  67 #include <named/os.h>
  68 #include <named/server.h>
  69 #include <named/lwresd.h>
  70 #include <named/main.h>
  71 #ifdef HAVE_LIBSCF
  72 #include <named/ns_smf_globals.h>
  73 #endif
  74
  75 #ifdef OPENSSL
  76 #include <openssl/opensslv.h>
  77 #endif
  78 #ifdef HAVE_LIBXML2
  79 #include <libxml/xmlversion.h>
  80 #endif
  81 /*
  82  * Include header files for database drivers here.
  83  */
  84 /* #include "xxdb.h" */
  85
  86 #ifdef CONTRIB_DLZ
  87 /*
  88  * Include contributed DLZ drivers if appropriate.
  89  */
  90 #include <dlz/dlz_drivers.h>
  91 #endif
  92
  93 /*
  94  * The maximum number of stack frames to dump on assertion failure.
  95  */
  96 #ifndef BACKTRACE_MAXFRAME
  97 #define BACKTRACE_MAXFRAME 128
  98 #endif
  99
 100 static isc_boolean_t    want_stats = ISC_FALSE;
 101 static char             program_name[ISC_DIR_NAMEMAX] = "named";
 102 static char             absolute_conffile[ISC_DIR_PATHMAX];
 103 static char             saved_command_line[512];
 104 static char             version[512];
 105 static unsigned int     maxsocks = 0;
 106 static int              maxudp = 0;
 107
 108 void
 109 ns_main_earlywarning(const char *format, ...) {
 110         va_list args;
 111
 112         va_start(args, format);
 113         if (ns_g_lctx != NULL) {
 114                 isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 115                                NS_LOGMODULE_MAIN, ISC_LOG_WARNING,
 116                                format, args);
 117         } else {
 118                 fprintf(stderr, "%s: ", program_name);
 119                 vfprintf(stderr, format, args);
 120                 fprintf(stderr, "\n");
 121                 fflush(stderr);
 122         }
 123         va_end(args);
 124 }
 125
 126 void
 127 ns_main_earlyfatal(const char *format, ...) {
 128         va_list args;
 129
 130         va_start(args, format);
 131         if (ns_g_lctx != NULL) {
 132                 isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 133                                NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL,
 134                                format, args);
 135                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 136                                NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL,
 137                                "exiting (due to early fatal error)");
 138         } else {
 139                 fprintf(stderr, "%s: ", program_name);
 140                 vfprintf(stderr, format, args);
 141                 fprintf(stderr, "\n");
 142                 fflush(stderr);
 143         }
 144         va_end(args);
 145
 146         exit(1);
 147 }
 148
 149 ISC_PLATFORM_NORETURN_PRE static void
 150 assertion_failed(const char *file, int line, isc_assertiontype_t type,
 151                  const char *cond) ISC_PLATFORM_NORETURN_POST;
 152
 153 static void
 154 assertion_failed(const char *file, int line, isc_assertiontype_t type,
 155                  const char *cond)
 156 {
 157         void *tracebuf[BACKTRACE_MAXFRAME];
 158         int i, nframes;
 159         isc_result_t result;
 160         const char *logsuffix = "";
 161         const char *fname;
 162
 163         /*
 164          * Handle assertion failures.
 165          */
 166
 167         if (ns_g_lctx != NULL) {
 168                 /*
 169                  * Reset the assertion callback in case it is the log
 170                  * routines causing the assertion.
 171                  */
 172                 isc_assertion_setcallback(NULL);
 173
 174                 result = isc_backtrace_gettrace(tracebuf, BACKTRACE_MAXFRAME,
 175                                                 &nframes);
 176                 if (result == ISC_R_SUCCESS && nframes > 0)
 177                         logsuffix = ", back trace";
 178                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 179                               NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL,
 180                               "%s:%d: %s(%s) failed%s", file, line,
 181                               isc_assertion_typetotext(type), cond, logsuffix);
 182                 if (result == ISC_R_SUCCESS) {
 183                         for (i = 0; i < nframes; i++) {
 184                                 unsigned long offset;
 185
 186                                 fname = NULL;
 187                                 result = isc_backtrace_getsymbol(tracebuf[i],
 188                                                                  &fname,
 189                                                                  &offset);
 190                                 if (result == ISC_R_SUCCESS) {
 191                                         isc_log_write(ns_g_lctx,
 192                                                       NS_LOGCATEGORY_GENERAL,
 193                                                       NS_LOGMODULE_MAIN,
 194                                                       ISC_LOG_CRITICAL,
 195                                                       "#%d %p in %s()+0x%lx", i,
 196                                                       tracebuf[i], fname,
 197                                                       offset);
 198                                 } else {
 199                                         isc_log_write(ns_g_lctx,
 200                                                       NS_LOGCATEGORY_GENERAL,
 201                                                       NS_LOGMODULE_MAIN,
 202                                                       ISC_LOG_CRITICAL,
 203                                                       "#%d %p in ??", i,
 204                                                       tracebuf[i]);
 205                                 }
 206                         }
 207                 }
 208                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 209                               NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL,
 210                               "exiting (due to assertion failure)");
 211         } else {
 212                 fprintf(stderr, "%s:%d: %s(%s) failed\n",
 213                         file, line, isc_assertion_typetotext(type), cond);
 214                 fflush(stderr);
 215         }
 216
 217         if (ns_g_coreok)
 218                 abort();
 219         exit(1);
 220 }
 221
 222 ISC_PLATFORM_NORETURN_PRE static void
 223 library_fatal_error(const char *file, int line, const char *format,
 224                     va_list args)
 225 ISC_FORMAT_PRINTF(3, 0) ISC_PLATFORM_NORETURN_POST;
 226
 227 static void
 228 library_fatal_error(const char *file, int line, const char *format,
 229                     va_list args)
 230 {
 231         /*
 232          * Handle isc_error_fatal() calls from our libraries.
 233          */
 234
 235         if (ns_g_lctx != NULL) {
 236                 /*
 237                  * Reset the error callback in case it is the log
 238                  * routines causing the assertion.
 239                  */
 240                 isc_error_setfatal(NULL);
 241
 242                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 243                               NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL,
 244                               "%s:%d: fatal error:", file, line);
 245                 isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 246                                NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL,
 247                                format, args);
 248                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 249                               NS_LOGMODULE_MAIN, ISC_LOG_CRITICAL,
 250                               "exiting (due to fatal error in library)");
 251         } else {
 252                 fprintf(stderr, "%s:%d: fatal error: ", file, line);
 253                 vfprintf(stderr, format, args);
 254                 fprintf(stderr, "\n");
 255                 fflush(stderr);
 256         }
 257
 258         if (ns_g_coreok)
 259                 abort();
 260         exit(1);
 261 }
 262
 263 static void
 264 library_unexpected_error(const char *file, int line, const char *format,
 265                          va_list args) ISC_FORMAT_PRINTF(3, 0);
 266
 267 static void
 268 library_unexpected_error(const char *file, int line, const char *format,
 269                          va_list args)
 270 {
 271         /*
 272          * Handle isc_error_unexpected() calls from our libraries.
 273          */
 274
 275         if (ns_g_lctx != NULL) {
 276                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 277                               NS_LOGMODULE_MAIN, ISC_LOG_ERROR,
 278                               "%s:%d: unexpected error:", file, line);
 279                 isc_log_vwrite(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 280                                NS_LOGMODULE_MAIN, ISC_LOG_ERROR,
 281                                format, args);
 282         } else {
 283                 fprintf(stderr, "%s:%d: fatal error: ", file, line);
 284                 vfprintf(stderr, format, args);
 285                 fprintf(stderr, "\n");
 286                 fflush(stderr);
 287         }
 288 }
 289
 290 static void
 291 lwresd_usage(void) {
 292         fprintf(stderr,
 293                 "usage: lwresd [-4|-6] [-c conffile | -C resolvconffile] "
 294                 "[-d debuglevel]\n"
 295                 "              [-f|-g] [-n number_of_cpus] [-p port] "
 296                 "[-P listen-port] [-s]\n"
 297                 "              [-t chrootdir] [-u username] [-i pidfile]\n"
 298                 "              [-m {usage|trace|record|size|mctx}]\n");
 299 }
 300
 301 static void
 302 usage(void) {
 303         if (ns_g_lwresdonly) {
 304                 lwresd_usage();
 305                 return;
 306         }
 307         fprintf(stderr,
 308                 "usage: named [-4|-6] [-c conffile] [-d debuglevel] "
 309                 "[-E engine] [-f|-g]\n"
 310                 "             [-n number_of_cpus] [-p port] [-s] "
 311                 "[-t chrootdir] [-u username]\n"
 312                 "             [-m {usage|trace|record|size|mctx}]\n");
 313 }
 314
 315 static void
 316 save_command_line(int argc, char *argv[]) {
 317         int i;
 318         char *src;
 319         char *dst;
 320         char *eob;
 321         const char truncated[] = "...";
 322         isc_boolean_t quoted = ISC_FALSE;
 323
 324         dst = saved_command_line;
 325         eob = saved_command_line + sizeof(saved_command_line);
 326
 327         for (i = 1; i < argc && dst < eob; i++) {
 328                 *dst++ = ' ';
 329
 330                 src = argv[i];
 331                 while (*src != '\0' && dst < eob) {
 332                         /*
 333                          * This won't perfectly produce a shell-independent
 334                          * pastable command line in all circumstances, but
 335                          * comes close, and for practical purposes will
 336                          * nearly always be fine.
 337                          */
 338                         if (quoted || isalnum(*src & 0xff) ||
 339                             *src == '-' || *src == '_' ||
 340                             *src == '.' || *src == '/') {
 341                                 *dst++ = *src++;
 342                                 quoted = ISC_FALSE;
 343                         } else {
 344                                 *dst++ = '\\';
 345                                 quoted = ISC_TRUE;
 346                         }
 347                 }
 348         }
 349
 350         INSIST(sizeof(saved_command_line) >= sizeof(truncated));
 351
 352         if (dst == eob)
 353                 strcpy(eob - sizeof(truncated), truncated);
 354         else
 355                 *dst = '\0';
 356 }
 357
 358 static int
 359 parse_int(char *arg, const char *desc) {
 360         char *endp;
 361         int tmp;
 362         long int ltmp;
 363
 364         ltmp = strtol(arg, &endp, 10);
 365         tmp = (int) ltmp;
 366         if (*endp != '\0')
 367                 ns_main_earlyfatal("%s '%s' must be numeric", desc, arg);
 368         if (tmp < 0 || tmp != ltmp)
 369                 ns_main_earlyfatal("%s '%s' out of range", desc, arg);
 370         return (tmp);
 371 }
 372
 373 static struct flag_def {
 374         const char *name;
 375         unsigned int value;
 376 } mem_debug_flags[] = {
 377         { "trace",  ISC_MEM_DEBUGTRACE },
 378         { "record", ISC_MEM_DEBUGRECORD },
 379         { "usage", ISC_MEM_DEBUGUSAGE },
 380         { "size", ISC_MEM_DEBUGSIZE },
 381         { "mctx", ISC_MEM_DEBUGCTX },
 382         { NULL, 0 }
 383 };
 384
 385 static void
 386 set_flags(const char *arg, struct flag_def *defs, unsigned int *ret) {
 387         for (;;) {
 388                 const struct flag_def *def;
 389                 const char *end = strchr(arg, ',');
 390                 int arglen;
 391                 if (end == NULL)
 392                         end = arg + strlen(arg);
 393                 arglen = end - arg;
 394                 for (def = defs; def->name != NULL; def++) {
 395                         if (arglen == (int)strlen(def->name) &&
 396                             memcmp(arg, def->name, arglen) == 0) {
 397                                 *ret |= def->value;
 398                                 goto found;
 399                         }
 400                 }
 401                 ns_main_earlyfatal("unrecognized flag '%.*s'", arglen, arg);
 402          found:
 403                 if (*end == '\0')
 404                         break;
 405                 arg = end + 1;
 406         }
 407 }
 408
 409 static void
 410 parse_command_line(int argc, char *argv[]) {
 411         int ch;
 412         int port;
 413         isc_boolean_t disable6 = ISC_FALSE;
 414         isc_boolean_t disable4 = ISC_FALSE;
 415
 416         save_command_line(argc, argv);
 417
 418         isc_commandline_errprint = ISC_FALSE;
 419         while ((ch = isc_commandline_parse(argc, argv,
 420                                            "46c:C:d:E:fFgi:lm:n:N:p:P:"
 421                                            "sS:t:T:u:vVx:")) != -1) {
 422                 switch (ch) {
 423                 case '4':
 424                         if (disable4)
 425                                 ns_main_earlyfatal("cannot specify -4 and -6");
 426                         if (isc_net_probeipv4() != ISC_R_SUCCESS)
 427                                 ns_main_earlyfatal("IPv4 not supported by OS");
 428                         isc_net_disableipv6();
 429                         disable6 = ISC_TRUE;
 430                         break;
 431                 case '6':
 432                         if (disable6)
 433                                 ns_main_earlyfatal("cannot specify -4 and -6");
 434                         if (isc_net_probeipv6() != ISC_R_SUCCESS)
 435                                 ns_main_earlyfatal("IPv6 not supported by OS");
 436                         isc_net_disableipv4();
 437                         disable4 = ISC_TRUE;
 438                         break;
 439                 case 'c':
 440                         ns_g_conffile = isc_commandline_argument;
 441                         lwresd_g_conffile = isc_commandline_argument;
 442                         if (lwresd_g_useresolvconf)
 443                                 ns_main_earlyfatal("cannot specify -c and -C");
 444                         ns_g_conffileset = ISC_TRUE;
 445                         break;
 446                 case 'C':
 447                         lwresd_g_resolvconffile = isc_commandline_argument;
 448                         if (ns_g_conffileset)
 449                                 ns_main_earlyfatal("cannot specify -c and -C");
 450                         lwresd_g_useresolvconf = ISC_TRUE;
 451                         break;
 452                 case 'd':
 453                         ns_g_debuglevel = parse_int(isc_commandline_argument,
 454                                                     "debug level");
 455                         break;
 456                 case 'E':
 457                         ns_g_engine = isc_commandline_argument;
 458                         break;
 459                 case 'f':
 460                         ns_g_foreground = ISC_TRUE;
 461                         break;
 462                 case 'g':
 463                         ns_g_foreground = ISC_TRUE;
 464                         ns_g_logstderr = ISC_TRUE;
 465                         break;
 466                 /* XXXBEW -i should be removed */
 467                 case 'i':
 468                         lwresd_g_defaultpidfile = isc_commandline_argument;
 469                         break;
 470                 case 'l':
 471                         ns_g_lwresdonly = ISC_TRUE;
 472                         break;
 473                 case 'm':
 474                         set_flags(isc_commandline_argument, mem_debug_flags,
 475                                   &isc_mem_debugging);
 476                         break;
 477                 case 'N': /* Deprecated. */
 478                 case 'n':
 479                         ns_g_cpus = parse_int(isc_commandline_argument,
 480                                               "number of cpus");
 481                         if (ns_g_cpus == 0)
 482                                 ns_g_cpus = 1;
 483                         break;
 484                 case 'p':
 485                         port = parse_int(isc_commandline_argument, "port");
 486                         if (port < 1 || port > 65535)
 487                                 ns_main_earlyfatal("port '%s' out of range",
 488                                                    isc_commandline_argument);
 489                         ns_g_port = port;
 490                         break;
 491                 /* XXXBEW Should -P be removed? */
 492                 case 'P':
 493                         port = parse_int(isc_commandline_argument, "port");
 494                         if (port < 1 || port > 65535)
 495                                 ns_main_earlyfatal("port '%s' out of range",
 496                                                    isc_commandline_argument);
 497                         lwresd_g_listenport = port;
 498                         break;
 499                 case 's':
 500                         /* XXXRTH temporary syntax */
 501                         want_stats = ISC_TRUE;
 502                         break;
 503                 case 'S':
 504                         maxsocks = parse_int(isc_commandline_argument,
 505                                              "max number of sockets");
 506                         break;
 507                 case 't':
 508                         /* XXXJAB should we make a copy? */
 509                         ns_g_chrootdir = isc_commandline_argument;
 510                         break;
 511                 case 'T':       /* NOT DOCUMENTED */
 512                         /*
 513                          * clienttest: make clients single shot with their
 514                          *             own memory context.
 515                          */
 516                         if (!strcmp(isc_commandline_argument, "clienttest"))
 517                                 ns_g_clienttest = ISC_TRUE;
 518                         else if (!strcmp(isc_commandline_argument, "nosoa"))
 519                                 ns_g_nosoa = ISC_TRUE;
 520                         else if (!strcmp(isc_commandline_argument, "noaa"))
 521                                 ns_g_noaa = ISC_TRUE;
 522                         else if (!strcmp(isc_commandline_argument, "maxudp512"))
 523                                 maxudp = 512;
 524                         else if (!strcmp(isc_commandline_argument, "maxudp1460"))
 525                                 maxudp = 1460;
 526                         else if (!strcmp(isc_commandline_argument, "nosyslog"))
 527                                 ns_g_nosyslog = ISC_TRUE;
 528                         else if (!strcmp(isc_commandline_argument, "nonearest"))
 529                                 ns_g_nonearest = ISC_TRUE;
 530                         else
 531                                 fprintf(stderr, "unknown -T flag '%s\n",
 532                                         isc_commandline_argument);
 533                         break;
 534                 case 'u':
 535                         ns_g_username = isc_commandline_argument;
 536                         break;
 537                 case 'v':
 538                         printf("%s %s", ns_g_product, ns_g_version);
 539                         if (*ns_g_description != 0)
 540                                 printf(" %s", ns_g_description);
 541                         printf("\n");
 542                         exit(0);
 543                 case 'V':
 544                         printf("%s %s", ns_g_product, ns_g_version);
 545                         if (*ns_g_description != 0)
 546                                 printf(" %s", ns_g_description);
 547                         printf(" <id:%s> built with %s\n", ns_g_srcid,
 548                                 ns_g_configargs);
 549 #ifdef OPENSSL
 550                         printf("using OpenSSL version: %s\n",
 551                                OPENSSL_VERSION_TEXT);
 552 #endif
 553 #ifdef HAVE_LIBXML2
 554                         printf("using libxml2 version: %s\n",
 555                                LIBXML_DOTTED_VERSION);
 556 #endif
 557                         exit(0);
 558                 case 'F':
 559                         /* Reserved for FIPS mode */
 560                         /* FALLTHROUGH */
 561                 case '?':
 562                         usage();
 563                         if (isc_commandline_option == '?')
 564                                 exit(0);
 565                         ns_main_earlyfatal("unknown option '-%c'",
 566                                            isc_commandline_option);
 567                         /* FALLTHROUGH */
 568                 default:
 569                         ns_main_earlyfatal("parsing options returned %d", ch);
 570                 }
 571         }
 572
 573         argc -= isc_commandline_index;
 574         argv += isc_commandline_index;
 575         POST(argv);
 576
 577         if (argc > 0) {
 578                 usage();
 579                 ns_main_earlyfatal("extra command line arguments");
 580         }
 581 }
 582
 583 static isc_result_t
 584 create_managers(void) {
 585         isc_result_t result;
 586         unsigned int socks;
 587
 588 #ifdef ISC_PLATFORM_USETHREADS
 589         if (ns_g_cpus == 0)
 590                 ns_g_cpus = ns_g_cpus_detected;
 591         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_SERVER,
 592                       ISC_LOG_INFO, "found %u CPU%s, using %u worker thread%s",
 593                       ns_g_cpus_detected, ns_g_cpus_detected == 1 ? "" : "s",
 594                       ns_g_cpus, ns_g_cpus == 1 ? "" : "s");
 595 #else
 596         ns_g_cpus = 1;
 597 #endif
 598         result = isc_taskmgr_create(ns_g_mctx, ns_g_cpus, 0, &ns_g_taskmgr);
 599         if (result != ISC_R_SUCCESS) {
 600                 UNEXPECTED_ERROR(__FILE__, __LINE__,
 601                                  "isc_taskmgr_create() failed: %s",
 602                                  isc_result_totext(result));
 603                 return (ISC_R_UNEXPECTED);
 604         }
 605
 606         result = isc_timermgr_create(ns_g_mctx, &ns_g_timermgr);
 607         if (result != ISC_R_SUCCESS) {
 608                 UNEXPECTED_ERROR(__FILE__, __LINE__,
 609                                  "isc_timermgr_create() failed: %s",
 610                                  isc_result_totext(result));
 611                 return (ISC_R_UNEXPECTED);
 612         }
 613
 614         result = isc_socketmgr_create2(ns_g_mctx, &ns_g_socketmgr, maxsocks);
 615         if (result != ISC_R_SUCCESS) {
 616                 UNEXPECTED_ERROR(__FILE__, __LINE__,
 617                                  "isc_socketmgr_create() failed: %s",
 618                                  isc_result_totext(result));
 619                 return (ISC_R_UNEXPECTED);
 620         }
 621         isc__socketmgr_maxudp(ns_g_socketmgr, maxudp);
 622         result = isc_socketmgr_getmaxsockets(ns_g_socketmgr, &socks);
 623         if (result == ISC_R_SUCCESS) {
 624                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 625                               NS_LOGMODULE_SERVER,
 626                               ISC_LOG_INFO, "using up to %u sockets", socks);
 627         }
 628
 629         result = isc_entropy_create(ns_g_mctx, &ns_g_entropy);
 630         if (result != ISC_R_SUCCESS) {
 631                 UNEXPECTED_ERROR(__FILE__, __LINE__,
 632                                  "isc_entropy_create() failed: %s",
 633                                  isc_result_totext(result));
 634                 return (ISC_R_UNEXPECTED);
 635         }
 636
 637         result = isc_hash_create(ns_g_mctx, ns_g_entropy, DNS_NAME_MAXWIRE);
 638         if (result != ISC_R_SUCCESS) {
 639                 UNEXPECTED_ERROR(__FILE__, __LINE__,
 640                                  "isc_hash_create() failed: %s",
 641                                  isc_result_totext(result));
 642                 return (ISC_R_UNEXPECTED);
 643         }
 644
 645         return (ISC_R_SUCCESS);
 646 }
 647
 648 static void
 649 destroy_managers(void) {
 650         ns_lwresd_shutdown();
 651
 652         isc_entropy_detach(&ns_g_entropy);
 653         if (ns_g_fallbackentropy != NULL)
 654                 isc_entropy_detach(&ns_g_fallbackentropy);
 655
 656         /*
 657          * isc_taskmgr_destroy() will block until all tasks have exited,
 658          */
 659         isc_taskmgr_destroy(&ns_g_taskmgr);
 660         isc_timermgr_destroy(&ns_g_timermgr);
 661         isc_socketmgr_destroy(&ns_g_socketmgr);
 662
 663         /*
 664          * isc_hash_destroy() cannot be called as long as a resolver may be
 665          * running.  Calling this after isc_taskmgr_destroy() ensures the
 666          * call is safe.
 667          */
 668         isc_hash_destroy();
 669 }
 670
 671 static void
 672 dump_symboltable() {
 673         int i;
 674         isc_result_t result;
 675         const char *fname;
 676         const void *addr;
 677
 678         if (isc__backtrace_nsymbols == 0)
 679                 return;
 680
 681         if (!isc_log_wouldlog(ns_g_lctx, ISC_LOG_DEBUG(99)))
 682                 return;
 683
 684         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 685                       ISC_LOG_DEBUG(99), "Symbol table:");
 686
 687         for (i = 0, result = ISC_R_SUCCESS; result == ISC_R_SUCCESS; i++) {
 688                 addr = NULL;
 689                 fname = NULL;
 690                 result = isc_backtrace_getsymbolfromindex(i, &addr, &fname);
 691                 if (result == ISC_R_SUCCESS) {
 692                         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 693                                       NS_LOGMODULE_MAIN, ISC_LOG_DEBUG(99),
 694                                       "[%d] %p %s", i, addr, fname);
 695                 }
 696         }
 697 }
 698
 699 static void
 700 setup(void) {
 701         isc_result_t result;
 702         isc_resourcevalue_t old_openfiles;
 703 #ifdef HAVE_LIBSCF
 704         char *instance = NULL;
 705 #endif
 706
 707         /*
 708          * Get the user and group information before changing the root
 709          * directory, so the administrator does not need to keep a copy
 710          * of the user and group databases in the chroot'ed environment.
 711          */
 712         ns_os_inituserinfo(ns_g_username);
 713
 714         /*
 715          * Initialize time conversion information
 716          */
 717         ns_os_tzset();
 718
 719         ns_os_opendevnull();
 720
 721 #ifdef HAVE_LIBSCF
 722         /* Check if named is under smf control, before chroot. */
 723         result = ns_smf_get_instance(&instance, 0, ns_g_mctx);
 724         /* We don't care about instance, just check if we got one. */
 725         if (result == ISC_R_SUCCESS)
 726                 ns_smf_got_instance = 1;
 727         else
 728                 ns_smf_got_instance = 0;
 729         if (instance != NULL)
 730                 isc_mem_free(ns_g_mctx, instance);
 731 #endif /* HAVE_LIBSCF */
 732
 733 #ifdef PATH_RANDOMDEV
 734         /*
 735          * Initialize system's random device as fallback entropy source
 736          * if running chroot'ed.
 737          */
 738         if (ns_g_chrootdir != NULL) {
 739                 result = isc_entropy_create(ns_g_mctx, &ns_g_fallbackentropy);
 740                 if (result != ISC_R_SUCCESS)
 741                         ns_main_earlyfatal("isc_entropy_create() failed: %s",
 742                                            isc_result_totext(result));
 743
 744                 result = isc_entropy_createfilesource(ns_g_fallbackentropy,
 745                                                       PATH_RANDOMDEV);
 746                 if (result != ISC_R_SUCCESS) {
 747                         ns_main_earlywarning("could not open pre-chroot "
 748                                              "entropy source %s: %s",
 749                                              PATH_RANDOMDEV,
 750                                              isc_result_totext(result));
 751                         isc_entropy_detach(&ns_g_fallbackentropy);
 752                 }
 753         }
 754 #endif
 755
 756 #ifdef ISC_PLATFORM_USETHREADS
 757         /*
 758          * Check for the number of cpu's before ns_os_chroot().
 759          */
 760         ns_g_cpus_detected = isc_os_ncpus();
 761 #endif
 762
 763         ns_os_chroot(ns_g_chrootdir);
 764
 765         /*
 766          * For operating systems which have a capability mechanism, now
 767          * is the time to switch to minimal privs and change our user id.
 768          * On traditional UNIX systems, this call will be a no-op, and we
 769          * will change the user ID after reading the config file the first
 770          * time.  (We need to read the config file to know which possibly
 771          * privileged ports to bind() to.)
 772          */
 773         ns_os_minprivs();
 774
 775         result = ns_log_init(ISC_TF(ns_g_username != NULL));
 776         if (result != ISC_R_SUCCESS)
 777                 ns_main_earlyfatal("ns_log_init() failed: %s",
 778                                    isc_result_totext(result));
 779
 780         /*
 781          * Now is the time to daemonize (if we're not running in the
 782          * foreground).  We waited until now because we wanted to get
 783          * a valid logging context setup.  We cannot daemonize any later,
 784          * because calling create_managers() will create threads, which
 785          * would be lost after fork().
 786          */
 787         if (!ns_g_foreground)
 788                 ns_os_daemonize();
 789
 790         /*
 791          * We call isc_app_start() here as some versions of FreeBSD's fork()
 792          * destroys all the signal handling it sets up.
 793          */
 794         result = isc_app_start();
 795         if (result != ISC_R_SUCCESS)
 796                 ns_main_earlyfatal("isc_app_start() failed: %s",
 797                                    isc_result_totext(result));
 798
 799         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 800                       ISC_LOG_NOTICE, "starting %s %s%s", ns_g_product,
 801                       ns_g_version, saved_command_line);
 802
 803         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 804                       ISC_LOG_NOTICE, "built with %s", ns_g_configargs);
 805
 806         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 807                       ISC_LOG_NOTICE,
 808                       "----------------------------------------------------");
 809         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 810                       ISC_LOG_NOTICE,
 811                       "BIND 9 is maintained by Internet Systems Consortium,");
 812         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 813                       ISC_LOG_NOTICE,
 814                       "Inc. (ISC), a non-profit 501(c)(3) public-benefit ");
 815         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 816                       ISC_LOG_NOTICE,
 817                       "corporation.  Support and training for BIND 9 are ");
 818         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 819                       ISC_LOG_NOTICE,
 820                       "available at https://www.isc.org/support");
 821         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 822                       ISC_LOG_NOTICE,
 823                       "----------------------------------------------------");
 824
 825         dump_symboltable();
 826
 827         /*
 828          * Get the initial resource limits.
 829          */
 830         (void)isc_resource_getlimit(isc_resource_stacksize,
 831                                     &ns_g_initstacksize);
 832         (void)isc_resource_getlimit(isc_resource_datasize,
 833                                     &ns_g_initdatasize);
 834         (void)isc_resource_getlimit(isc_resource_coresize,
 835                                     &ns_g_initcoresize);
 836         (void)isc_resource_getlimit(isc_resource_openfiles,
 837                                     &ns_g_initopenfiles);
 838
 839         /*
 840          * System resources cannot effectively be tuned on some systems.
 841          * Raise the limit in such cases for safety.
 842          */
 843         old_openfiles = ns_g_initopenfiles;
 844         ns_os_adjustnofile();
 845         (void)isc_resource_getlimit(isc_resource_openfiles,
 846                                     &ns_g_initopenfiles);
 847         if (old_openfiles != ns_g_initopenfiles) {
 848                 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
 849                               NS_LOGMODULE_MAIN, ISC_LOG_NOTICE,
 850                               "adjusted limit on open files from "
 851                               "%" ISC_PRINT_QUADFORMAT "u to "
 852                               "%" ISC_PRINT_QUADFORMAT "u",
 853                               old_openfiles, ns_g_initopenfiles);
 854         }
 855
 856         /*
 857          * If the named configuration filename is relative, prepend the current
 858          * directory's name before possibly changing to another directory.
 859          */
 860         if (! isc_file_isabsolute(ns_g_conffile)) {
 861                 result = isc_file_absolutepath(ns_g_conffile,
 862                                                absolute_conffile,
 863                                                sizeof(absolute_conffile));
 864                 if (result != ISC_R_SUCCESS)
 865                         ns_main_earlyfatal("could not construct absolute path "
 866                                            "of configuration file: %s",
 867                                            isc_result_totext(result));
 868                 ns_g_conffile = absolute_conffile;
 869         }
 870
 871         /*
 872          * Record the server's startup time.
 873          */
 874         result = isc_time_now(&ns_g_boottime);
 875         if (result != ISC_R_SUCCESS)
 876                 ns_main_earlyfatal("isc_time_now() failed: %s",
 877                                    isc_result_totext(result));
 878
 879         result = create_managers();
 880         if (result != ISC_R_SUCCESS)
 881                 ns_main_earlyfatal("create_managers() failed: %s",
 882                                    isc_result_totext(result));
 883
 884         ns_builtin_init();
 885
 886         /*
 887          * Add calls to register sdb drivers here.
 888          */
 889         /* xxdb_init(); */
 890
 891 #ifdef ISC_DLZ_DLOPEN
 892         /*
 893          * Register the DLZ "dlopen" driver.
 894          */
 895         result = dlz_dlopen_init(ns_g_mctx);
 896         if (result != ISC_R_SUCCESS)
 897                 ns_main_earlyfatal("dlz_dlopen_init() failed: %s",
 898                                    isc_result_totext(result));
 899 #endif
 900
 901 #if CONTRIB_DLZ
 902         /*
 903          * Register any other contributed DLZ drivers.
 904          */
 905         result = dlz_drivers_init();
 906         if (result != ISC_R_SUCCESS)
 907                 ns_main_earlyfatal("dlz_drivers_init() failed: %s",
 908                                    isc_result_totext(result));
 909 #endif
 910
 911         ns_server_create(ns_g_mctx, &ns_g_server);
 912 }
 913
 914 static void
 915 cleanup(void) {
 916         destroy_managers();
 917
 918         ns_server_destroy(&ns_g_server);
 919
 920         ns_builtin_deinit();
 921
 922         /*
 923          * Add calls to unregister sdb drivers here.
 924          */
 925         /* xxdb_clear(); */
 926
 927 #ifdef CONTRIB_DLZ
 928         /*
 929          * Unregister contributed DLZ drivers.
 930          */
 931         dlz_drivers_clear();
 932 #endif
 933 #ifdef ISC_DLZ_DLOPEN
 934         /*
 935          * Unregister "dlopen" DLZ driver.
 936          */
 937         dlz_dlopen_clear();
 938 #endif
 939
 940         dns_name_destroy();
 941
 942         isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL, NS_LOGMODULE_MAIN,
 943                       ISC_LOG_NOTICE, "exiting");
 944         ns_log_shutdown();
 945 }
 946
 947 static char *memstats = NULL;
 948
 949 void
 950 ns_main_setmemstats(const char *filename) {
 951         /*
 952          * Caller has to ensure locking.
 953          */
 954
 955         if (memstats != NULL) {
 956                 free(memstats);
 957                 memstats = NULL;
 958         }
 959         if (filename == NULL)
 960                 return;
 961         memstats = malloc(strlen(filename) + 1);
 962         if (memstats)
 963                 strcpy(memstats, filename);
 964 }
 965
 966 #ifdef HAVE_LIBSCF
 967 /*
 968  * Get FMRI for the named process.
 969  */
 970 isc_result_t
 971 ns_smf_get_instance(char **ins_name, int debug, isc_mem_t *mctx) {
 972         scf_handle_t *h = NULL;
 973         int namelen;
 974         char *instance;
 975
 976         REQUIRE(ins_name != NULL && *ins_name == NULL);
 977
 978         if ((h = scf_handle_create(SCF_VERSION)) == NULL) {
 979                 if (debug)
 980                         UNEXPECTED_ERROR(__FILE__, __LINE__,
 981                                          "scf_handle_create() failed: %s",
 982                                          scf_strerror(scf_error()));
 983                 return (ISC_R_FAILURE);
 984         }
 985
 986         if (scf_handle_bind(h) == -1) {
 987                 if (debug)
 988                         UNEXPECTED_ERROR(__FILE__, __LINE__,
 989                                          "scf_handle_bind() failed: %s",
 990                                          scf_strerror(scf_error()));
 991                 scf_handle_destroy(h);
 992                 return (ISC_R_FAILURE);
 993         }
 994
 995         if ((namelen = scf_myname(h, NULL, 0)) == -1) {
 996                 if (debug)
 997                         UNEXPECTED_ERROR(__FILE__, __LINE__,
 998                                          "scf_myname() failed: %s",
 999                                          scf_strerror(scf_error()));
1000                 scf_handle_destroy(h);
1001                 return (ISC_R_FAILURE);
1002         }
1003
1004         if ((instance = isc_mem_allocate(mctx, namelen + 1)) == NULL) {
1005                 UNEXPECTED_ERROR(__FILE__, __LINE__,
1006                                  "ns_smf_get_instance memory "
1007                                  "allocation failed: %s",
1008                                  isc_result_totext(ISC_R_NOMEMORY));
1009                 scf_handle_destroy(h);
1010                 return (ISC_R_FAILURE);
1011         }
1012
1013         if (scf_myname(h, instance, namelen + 1) == -1) {
1014                 if (debug)
1015                         UNEXPECTED_ERROR(__FILE__, __LINE__,
1016                                          "scf_myname() failed: %s",
1017                                          scf_strerror(scf_error()));
1018                 scf_handle_destroy(h);
1019                 isc_mem_free(mctx, instance);
1020                 return (ISC_R_FAILURE);
1021         }
1022
1023         scf_handle_destroy(h);
1024         *ins_name = instance;
1025         return (ISC_R_SUCCESS);
1026 }
1027 #endif /* HAVE_LIBSCF */
1028
1029 int
1030 main(int argc, char *argv[]) {
1031         isc_result_t result;
1032 #ifdef HAVE_LIBSCF
1033         char *instance = NULL;
1034 #endif
1035
1036         /*
1037          * Record version in core image.
1038          * strings named.core | grep "named version:"
1039          */
1040         strlcat(version,
1041 #if defined(NO_VERSION_DATE) || !defined(__DATE__)
1042                 "named version: BIND " VERSION " <" SRCID ">",
1043 #else
1044                 "named version: BIND " VERSION " <" SRCID "> (" __DATE__ ")",
1045 #endif
1046                 sizeof(version));
1047         result = isc_file_progname(*argv, program_name, sizeof(program_name));
1048         if (result != ISC_R_SUCCESS)
1049                 ns_main_earlyfatal("program name too long");
1050
1051         if (strcmp(program_name, "lwresd") == 0)
1052                 ns_g_lwresdonly = ISC_TRUE;
1053
1054         if (result != ISC_R_SUCCESS)
1055                 ns_main_earlyfatal("failed to build internal symbol table");
1056
1057         isc_assertion_setcallback(assertion_failed);
1058         isc_error_setfatal(library_fatal_error);
1059         isc_error_setunexpected(library_unexpected_error);
1060
1061         ns_os_init(program_name);
1062
1063         dns_result_register();
1064         dst_result_register();
1065         isccc_result_register();
1066
1067         parse_command_line(argc, argv);
1068
1069         /*
1070          * Warn about common configuration error.
1071          */
1072         if (ns_g_chrootdir != NULL) {
1073                 int len = strlen(ns_g_chrootdir);
1074                 if (strncmp(ns_g_chrootdir, ns_g_conffile, len) == 0 &&
1075                     (ns_g_conffile[len] == '/' || ns_g_conffile[len] == '\\'))
1076                         ns_main_earlywarning("config filename (-c %s) contains "
1077                                              "chroot path (-t %s)",
1078                                              ns_g_conffile, ns_g_chrootdir);
1079         }
1080
1081         result = isc_mem_create(0, 0, &ns_g_mctx);
1082         if (result != ISC_R_SUCCESS)
1083                 ns_main_earlyfatal("isc_mem_create() failed: %s",
1084                                    isc_result_totext(result));
1085         isc_mem_setname(ns_g_mctx, "main", NULL);
1086
1087         setup();
1088
1089         /*
1090          * Start things running and then wait for a shutdown request
1091          * or reload.
1092          */
1093         do {
1094                 result = isc_app_run();
1095
1096                 if (result == ISC_R_RELOAD) {
1097                         ns_server_reloadwanted(ns_g_server);
1098                 } else if (result != ISC_R_SUCCESS) {
1099                         UNEXPECTED_ERROR(__FILE__, __LINE__,
1100                                          "isc_app_run(): %s",
1101                                          isc_result_totext(result));
1102                         /*
1103                          * Force exit.
1104                          */
1105                         result = ISC_R_SUCCESS;
1106                 }
1107         } while (result != ISC_R_SUCCESS);
1108
1109 #ifdef HAVE_LIBSCF
1110         if (ns_smf_want_disable == 1) {
1111                 result = ns_smf_get_instance(&instance, 1, ns_g_mctx);
1112                 if (result == ISC_R_SUCCESS && instance != NULL) {
1113                         if (smf_disable_instance(instance, 0) != 0)
1114                                 UNEXPECTED_ERROR(__FILE__, __LINE__,
1115                                                  "smf_disable_instance() "
1116                                                  "failed for %s : %s",
1117                                                  instance,
1118                                                  scf_strerror(scf_error()));
1119                 }
1120                 if (instance != NULL)
1121                         isc_mem_free(ns_g_mctx, instance);
1122         }
1123 #endif /* HAVE_LIBSCF */
1124
1125         cleanup();
1126
1127         if (want_stats) {
1128                 isc_mem_stats(ns_g_mctx, stdout);
1129                 isc_mutex_stats(stdout);
1130         }
1131
1132         if (ns_g_memstatistics && memstats != NULL) {
1133                 FILE *fp = NULL;
1134                 result = isc_stdio_open(memstats, "w", &fp);
1135                 if (result == ISC_R_SUCCESS) {
1136                         isc_mem_stats(ns_g_mctx, fp);
1137                         isc_mutex_stats(fp);
1138                         isc_stdio_close(fp);
1139                 }
1140         }
1141         isc_mem_destroy(&ns_g_mctx);
1142         isc_mem_checkdestroyed(stderr);
1143
1144         ns_main_setmemstats(NULL);
1145
1146         isc_app_finish();
1147
1148         ns_os_closedevnull();
1149
1150         ns_os_shutdown();
1151
1152         return (0);
1153 }